<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand" label="#">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag @close="removeRightById(scope.row,item1.id)" closable>{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级和三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环嵌套渲染二级权限 -->
                                <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag type="success" @close="removeRightById(scope.row,item2.id)" closable>{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>

                <el-table-column type="index" label="#"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                        <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRolesById(scope.row.id)">删除</el-button>
                        <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 添加角色对话框 -->
        <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
            <!-- 内容主要区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
                <el-form-item label="角色名称" prop="roleName" label-width="80px">
                    <el-input v-model="addForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc" label-width="80px">
                    <el-input v-model="addForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addRoles">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改角色对话框 -->
        <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
            <!-- 内容主要区域 -->
            <el-form :model="editForm" :rules="addFormRules" ref="editFormRef" label-width="70px">
                <el-form-item label="角色名称" prop="roleName" label-width="80px">
                    <el-input v-model="editForm.roleName"></el-input>
                </el-form-item>
                <el-form-item label="角色描述" prop="roleDesc" label-width="80px">
                    <el-input v-model="editForm.roleDesc"></el-input>
                </el-form-item>
            </el-form>
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editRolesInfo">确 定</el-button>
            </span>
        </el-dialog>

        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
            <!-- 树形控件 -->
            <!-- default-checked-keys="defKeys" -->
            <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>


<script>
export default {
    data () {
        return {
            rolelist: [],
            //控制 添加角色 对话框的显示/隐藏
            addDialogVisible: false,
            // 控制 修改角色 对话框显示/隐藏
            editDialogVisible: false,
            //添加用户的表单数据
            addForm: {
                roleName: '',
                roleDesc: ''
            },
            //添加表单的验证规则对象
            addFormRules: {
                roleName: [{ required: true, message: '请输入角色名称', trigger: 'blur' }, { min: 3, max: 10, message: '角色名称的长度在3~10个字符之间', trigger: "blur" }],
                roleDesc: [{ required: true, message: '请输入角色描述', trigger: 'blur' }, { min: 3, max: 15, message: '角色描述的长度在3~15个字符之间', trigger: "blur" }]
            },
            //查询到的角色信息对象
            editForm: {},
            //控制分配权限对话框的显示/隐藏
            setRightDialogVisible: false,
            // 所有权限的数据
            rightslist: [],
            // 树形控件的属性绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            //默认选中的节点Id值数组
            defKeys: [],
            //当前即将分配权限的角色id
            roleId: ''
        }
    },
    created () {
        this.getRolesList();
    },
    methods: {
        async getRolesList () {
            const { data: res } = await this.$http.get('roles')
            if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败!');
            }
            this.rolelist = res.data
            // console.log(res.data);
        },
        // 点击小标签右上角的X时根据id删除权限
        async removeRightById (role, rightId) {
            const confirmResult = await this.$confirm('此操作将删除该权限, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)

            if (confirmResult !== 'confirm') return
            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if (res.meta.status !== 200) {
                return this.$message.error('删除权限失败!')
            }
            // this.getRolesList()
            role.children = res.data
        },
        //监听修改角色对话框的关闭事件(关闭后重置表单)
        addDialogClosed () {
            this.$refs.addFormRef.resetFields()
        },
        // 点击确定添加角色
        addRoles () {
            this.$refs.addFormRef.validate(async valid => {
                if (!valid) return
                const { data: res } = await this.$http.post('roles', this.addForm)
                if (res.meta.status !== 201) {
                    this.$message.error('添加角色失败!')
                }
                this.$message.success('添加角色成功!')
                //隐藏添加用户对话框
                this.addDialogVisible = false
                //刷新用户列表
                this.getRolesList()
            })
        },
        //监听修改角色对话框的关闭事件(关闭后重置表单)
        editDialogClosed () {
            this.$refs.editFormRef.resetFields()
        },
        //展示编辑角色的对话框
        async showEditDialog (id) {
            this.editDialogVisible = true
            const { data: res } = await this.$http.get('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('查询用户信息失败!')
            }
            this.editForm = res.data
        },
        //修改角色信息提交
        editRolesInfo () {
            //预校验
            this.$refs.editFormRef.validate(async valid => {
                if (!valid) return
                //发起修改用户信息的请求
                const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
                console.log(res);
                if (res.meta.status !== 200) {
                    return this.$message.error('数据更新失败!')
                }
                //关闭对话框
                this.editDialogVisible = false
                //刷新数据列表
                this.getRolesList()
                //提示修改成功
                this.$message.success('用户信息更新成功!')
            })
        },

        //根据id值删除对应角色
        async removeRolesById (id) {
            //弹框询问用户是否删除数据
            const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            // 如果用户确认删除，则返回值为字符串confirm
            // 如果用户取消了删除，则返回值为字符串 cancel
            if (confirmResult !== 'confirm') return
            const { data: res } = await this.$http.delete('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('删除用户失败!')
            }
            this.$message.success('删除用户成功!')
            this.getRolesList()
        },
        //展示分配权限的对话框
        async showSetRightDialog (role) {
            this.roleId = role.id
            // 获取所有权限的数据 
            const { data: res } = await this.$http.get('rights/tree')
            if (res.meta.status !== 200) {
                return this.$message.error('获取权限数据失败!')
            }
            this.rightslist = res.data
            // 递归获取三级节点的Id
            this.getLeafKeys(role, this.defKeys)

            this.setRightDialogVisible = true
        },
        // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defkeys 中
        getLeafKeys (node, arr) {
            //如果当前node节点不包含children属性，则是三级节点
            if (!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach(item => this.getLeafKeys(item, arr))
        },
        //监听分配权限对话框的关闭事件
        setRightDialogClosed () {
            this.defKeys = []
        },
        //为角色分配权限
        async allotRights () {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            // console.log(keys);
            const idStr = keys.join(',')
            const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
            if (res.meta.status !== 200) {
                return this.$message.error('分配权限失败!')
            }
            this.$message.success('分配权限成功!')
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }
}
</script>

<style lang="less" scoped>
.el-tag {
    margin: 6px;
}
.bdtop {
    border-top: 1px solid #eee;
}
.bdbottom {
    border-bottom: 1px solid #eee;
}

.vcenter {
    display: flex;
    align-items: center;
}
</style>